CN201137533Y

CN201137533Y - Carburetor for gasoline engine with needle valve provided with loose-proof sleeve

Info

Publication number: CN201137533Y
Application number: CNU2008200309053U
Authority: CN
Inventors: 陈其安
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-01-10
Filing date: 2008-01-10
Publication date: 2008-10-22
Anticipated expiration: 2018-01-10

Abstract

The utility model relates to a carburetor of gasoline engine, in particular to a gasoline engine carburetor having a loose proof sleeve on an oil needle, which is characterized in that the adjusting rod is fixedly sheathed by a plastic sleeve between the screw axle part and the adjusting cap. The utility model resolves the defects of the prior art and provides a gasoline engine carburetor whose oil needle and carburetor body have accurate fit, without oil leakage and with a loose proof sleeve on the oil needle.

Description

The gasoline engine carburetor of spindle band loose-proof sleeve

Technical field

The utility model relates to a kind of gasoline engine carburetor, is meant that especially spindle is provided with the gasoline engine carburetor of loose-proof sleeve.

Background technique

Existing gasoline engine carburetor, Carburetor body, main oil supplying device, idling oil supplying device, starting arrangement, closure and rail interface etc. have been consisted essentially of, Carburetor is the basis state of the art good with Engine Matching before dispatching from the factory, the adjusting spindle of controlling main oil supplying device and idling oil supplying device fuel delivery is regulated, make Carburetor when engine oil, the ratio of fuel oil and air reaches best hybridization.But normally direct screw-thread fit between the adjusting spindle of existing structure and the Carburetor body, quality of fit so between the two is not high, be easy to cause leakage of oil, influence the normal regulating and the sensitivity of Carburetor, cause the reason of the problems referred to above that following factors are arranged: 1, the tapped hole on the Carburetor body is when being processed to form, the chip that processing produces in tapped hole still remains on wherein, has hindered to regulate spindle to the interior level and smooth helical rotation of tapped hole; 2, screw thread and the screw thread of regulating on the spindle in the Carburetor body apertures is very little, is difficult to realize desired manufacturing tolerances.Any fluctuation of tolerance all can cause producing between this two thread die cutting leaks.In addition, any fluctuation of tolerance all can cause regulating the unfavorable of spindle and moves axially; 3, the tip of regulating spindle be tilt and with body on straight hole be complementary, more a spot of fuel flows into outlet passage from valve chamber.And because pin end and around the microsize in the hole of pin end, the pin end departs from from the minute movement of its radial center position and can change turbulent flow and know other characteristic of fluid, makes flow velocity put from the setting of expection undesirable variation takes place.

Also have at present and a kind ofly made improved gasoline engine carburetor at above-mentioned problem, as shown in Figure 1, its basic structure is with above-mentioned the same, but its spindle is provided with a spring, after spindle screws in, spring is just conflicted between the adjusting cap and Carburetor body of spindle, improve cooperating between the screw thread on screw thread and the Carburetor body on the spindle by spring like this, improve the precision between spindle and the Carburetor body, but also there are some problems in this structure: increased the preceding difficulty of regulating of dispatching from the factory after 1, spring is set; 2, the time has been grown, and spring is aging easily, and its problem of the aging back of spring occurs again thereupon; 3, increased cost.

Summary of the invention

The utility model has overcome the deficiency that present technology exists, and provides that highi degree of accuracy cooperates between a kind of spindle and the Carburetor body, and the gasoline engine carburetor of the novel spindle band loose-proof sleeve of leakage of oil situation can not take place.

For achieving the above object, the utility model provides following technological scheme: a kind of gasoline engine carburetor of spindle band loose-proof sleeve, include the Carburetor body, the idling oil supplying device, main oil supplying device, starting drive, closure and rail interface, respectively be provided with the adjusting spindle of regulating fuel delivery in idling oil supplying device and the main oil supplying device, described adjusting spindle is divided into regulates cap and adjustable lever, the adjustable lever of described adjusting spindle includes screw spindle part, no thread rod part and valve tip, it is characterized in that: fixed cover is provided with plastic sheath on the described adjustable lever, and plastic sheath places screw spindle part and regulates between the cap.

Pass through such scheme, we just can adopt and overcome plastic sheath and cooperating of Carburetor body original the cooperation between metal threaded and metal threaded and produce the not high enough problem of precision, solved fuel oil very easily and leaked into the outside from valve chamber, perhaps air enters the problem of valve chamber from the outside, and, thereby the modulating valve of described band locking device can be resisted the vibration firm support on body.

Further setting of the present utility model is: described screw spindle part and the adjustable lever of regulating between the cap partly are provided with the annular knurl decorative pattern, plastic sheath is fixedly installed on the annular knurl decorative pattern, the purpose that the annular knurl decorative pattern is set is can well the fixed plastics cover, and plastic sheath upwards can not rotated in week; Be socketed with stuffing box gland on the no thread rod part of described adjustable lever, the body on sealing cover and the Carburetor is sealed and matched, and the sealing between spindle and the Carburetor body is regulated in so further assurance.

Of the present utility model further the setting again is: the outer circumferential face of described plastic sheath is a smooth surface, when regulating spindle screw-in Carburetor body, screw-thread fit on the outer circumferential face of plastic sheath and the Carburetor body 1 and be squeezed out screw thread, the diameter of described plastic sheath is slightly less than the screw spindle part diameter of adjustable lever.

In such scheme, the outer circumferential face of described plastic sheath is a smooth surface, and the diameter of described plastic sheath is slightly less than the diameter of the screw spindle part of adjustable lever.Like this after regulating spindle screw-in Carburetor body, squeeze out screw thread with regard to passive screw thread on the plastic sheath by on the Carburetor body, screw-thread fit on plastic sheath and the Carburetor body is just very accurate like this, well solved metal threaded and metal threaded between owing to the not high problem that produces leakage of oil of quality of fit.

Below in conjunction with accompanying drawing the utility model is further described

Description of drawings

Fig. 1 is the structural representation of the Carburetor of prior art;

Fig. 2 is the utility model embodiment's a structural representation;

Fig. 3 be among Fig. 2 A to cross-sectional view;

Fig. 4 be among Fig. 2 B to cross-sectional view;

Fig. 5 is the structural representation of adjusting spindle when plastic sheath not being installed on the main oil supplying device;

Fig. 6 is the structural representation of adjusting spindle when plastic sheath is installed on the main oil supplying device;

Fig. 7 is the structural representation of adjusting spindle when plastic sheath not being installed on the idling oil supplying device;

Fig. 8 is the structural representation of adjusting spindle when plastic sheath is installed on the idling oil supplying device.

Embodiment

As Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7 and shown in Figure 8, a kind of gasoline engine carburetor of spindle band loose-proof sleeve, include Carburetor body 1, the idling oil supplying device, main oil supplying device, starting drive, closure and rail interface, respectively be provided with the adjusting spindle 2 of regulating fuel delivery in idling oil supplying device and the main oil supplying device, described adjusting spindle 2 is divided into regulates cap 21 and adjustable lever 22, the adjustable lever 22 of described adjusting spindle 1 includes screw spindle part 221, no thread rod part 223 and valve tip 224, in the utility model embodiment, fixed cover is provided with plastic sheath 3 on the described adjustable lever 22, and plastic sheath 3 places screw spindle part 221 and regulates between the cap 21.For further fixed plastics cover 3, described adjustable lever between screw spindle part 221 and adjusting cap 21 partly is provided with annular knurl decorative pattern 222, plastic sheath 3 is fixedly installed on the annular knurl decorative pattern 222, plastic sheath 3 rotation jointly with it in spindle 2 rotations like this, and static mutually between plastic sheath 3 and the spindle 2; The outer circumferential face of described plastic sheath 3 is a smooth surface, the diameter of described plastic sheath 3 is slightly less than the diameter of the screw spindle part 221 of adjustable lever 22, like this after regulating spindle 2 screw-in Carburetor bodies 1, squeeze out screw thread with regard to passive screw thread on the plastic sheath 3 by on the Carburetor body 1, plastic sheath 3 is just very accurate with the screw-thread fit on the Carburetor body 1 like this, well solved metal threaded and metal threaded between owing to the not high problem that produces leakage of oil of quality of fit.Certainly in the utility model embodiment, also can be provided with screw thread on the outer surface of plastic sheath 3, but as long as the screw thread on this screw thread and the body does not have the gap at axial direction, but common so cumbersome, so do not adopt.Present embodiment is in order further to guarantee to regulate the sealing between spindle 2 and the Carburetor body 1, so be socketed with stuffing box gland 4 on the no thread rod part 223 of adjustable lever 22, stuffing box gland 4 is sealed and matched with Carburetor body 1.

Though above-mentioned explanation has comprised many details, these should not be interpreted as the restriction of the scope of the invention, are the example as certain embodiments.Many other distortion all are possible, and are conspicuous to those skilled in the art, and corresponding scope of the present invention be can't help embodiment described herein and determined, and should be determined by subsidiary claim and their equivalent.

Claims

1, a kind of gasoline engine carburetor of spindle band loose-proof sleeve, include Carburetor body, idling oil supplying device, main oil supplying device, starting drive, closure and rail interface, respectively be provided with the adjusting spindle of regulating fuel delivery in idling oil supplying device and the main oil supplying device, described adjusting spindle is divided into regulates cap and adjustable lever, the adjustable lever of described adjusting spindle includes screw spindle part, no thread rod part and valve tip, it is characterized in that: fixed cover is provided with plastic sheath on the described adjustable lever, and plastic sheath places screw spindle part and regulates between the cap.

2, the gasoline engine carburetor of spindle band loose-proof sleeve according to claim 1 is characterized in that: described screw spindle part and the adjustable lever of regulating between the cap partly are provided with the annular knurl decorative pattern, and plastic sheath is fixedly installed on the annular knurl decorative pattern.

3, the gasoline engine carburetor of spindle loose-proof sleeve according to claim 1 and 2 is characterized in that: be socketed with stuffing box gland on the no thread rod part of described adjustable lever, the body on sealing cover and the Carburetor is sealed and matched.

4, the gasoline engine carburetor of spindle band loose-proof sleeve according to claim 2, it is characterized in that: the outer circumferential face of described plastic sheath is a smooth surface, when regulating spindle screw-in Carburetor body, screw-thread fit on the outer circumferential face of plastic sheath and the Carburetor body 1 and be squeezed out screw thread, the diameter of described plastic sheath is slightly less than the screw spindle part diameter of adjustable lever.

5, the gasoline engine carburetor of spindle loose-proof sleeve according to claim 3, it is characterized in that: it is characterized in that: the outer circumferential face of described plastic sheath is a smooth surface, when regulating spindle screw-in Carburetor body, screw-thread fit on the outer circumferential face of plastic sheath and the Carburetor body 1 and be squeezed out screw thread, the diameter of described plastic sheath is slightly less than the screw spindle part diameter of adjustable lever.